The Minimum Flow Cost Hamiltonian Cycle Problem: A comparison of formulations. - Camilo Ortiz-Astorquiza; Iván A. Contreras; Gilbert Laporte (Discret. Appl. Math., 2015)

Multi-level facility location as the maximization of a submodular set function. - Camilo Ortiz-Astorquiza; Iván A. Contreras; Gilbert Laporte (Eur. J. Oper. Res., 2015)

Formulations and Approximation Algorithms for Multilevel Uncapacitated Facility Location. - Camilo Ortiz-Astorquiza; Iván A. Contreras; Gilbert Laporte (INFORMS J. Comput., 2017)

Multi-level facility location problems. - Camilo Ortiz-Astorquiza; Iván A. Contreras; Gilbert Laporte (Eur. J. Oper. Res., 2018)

An Exact Algorithm for Multilevel Uncapacitated Facility Location. - Camilo Ortiz-Astorquiza; Iván A. Contreras; Gilbert Laporte (Transp. Sci., 2019)

The Locomotive Assignment Problem with Distributed Power at the Canadian National Railway Company. - Camilo Ortiz-Astorquiza; Jean-François Cordeau; Emma Frejinger (Transp. Sci., 2021)